diff --git a/exercises/standard_library_types/arc1.rs b/exercises/standard_library_types/arc1.rs
index e6c220b..d7dc93d 100644
--- a/exercises/standard_library_types/arc1.rs
+++ b/exercises/standard_library_types/arc1.rs
@@ -14,7 +14,7 @@
 
 
 // Make this code compile by filling in a value for `shared_numbers` where the
-// first TODO comment is and create an initial binding for `child_numbers`
+// first TODO comment is, and create an initial binding for `child_numbers`
 // where the second TODO comment is. Try not to create any copies of the `numbers` Vec!
 // Execute `rustlings hint arc1` for hints :)